From: Andrew Morton <akpm@linux-foundation.org>
To: Johannes Weiner <hannes@cmpxchg.org>
Cc: Dave Chinner <david@fromorbit.com>,
Rik van Riel <riel@redhat.com>, Jan Kara <jack@suse.cz>,
Vlastimil Babka <vbabka@suse.cz>,
Peter Zijlstra <peterz@infradead.org>, Tejun Heo <tj@kernel.org>,
Andi Kleen <andi@firstfloor.org>,
Andrea Arcangeli <aarcange@redhat.com>,
Greg Thelen <gthelen@google.com>,
Christoph Hellwig <hch@infradead.org>,
Hugh Dickins <hughd@google.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Mel Gorman <mgorman@suse.de>, Minchan Kim <minchan.kim@gmail.com>,
Michel Lespinasse <walken@google.com>,
Seth Jennings <sjenning@linux.vnet.ibm.com>,
Roman Gushchin <klamm@yandex-team.ru>,
Ozgun Erdogan <ozgun@citusdata.com>,
Metin Doslu <metin@citusdata.com>,
linux-mm@kvack.org, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [patch 0/9] mm: thrash detection-based file cache sizing v6
Date: Mon, 25 Nov 2013 16:57:29 -0800 [thread overview]
Message-ID: <20131125165729.3ad409506fb6db058d88c258@linux-foundation.org> (raw)
In-Reply-To: <1385336308-27121-1-git-send-email-hannes@cmpxchg.org>
On Sun, 24 Nov 2013 18:38:19 -0500 Johannes Weiner <hannes@cmpxchg.org> wrote:
> This series solves the problem by maintaining a history of pages
> evicted from the inactive list, enabling the VM to detect frequently
> used pages regardless of inactive list size and facilitate working set
> transitions.
It's a very readable patchset - thanks for taking the time to do that.
> 31 files changed, 1253 insertions(+), 401 deletions(-)
It's also a *ton* of stuff. More code complexity, larger kernel data
structures. All to address a quite narrow class of workloads on a
relatively small window of machine sizes. How on earth do we decide
whether it's worth doing?
Also, what's the memcg angle? This is presently a global thing - do
you think we're likely to want to make it per-memcg in the future?
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next prev parent reply other threads:[~2013-11-26 0:57 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-24 23:38 [patch 0/9] mm: thrash detection-based file cache sizing v6 Johannes Weiner
2013-11-24 23:38 ` [patch 1/9] fs: cachefiles: use add_to_page_cache_lru() Johannes Weiner
2013-11-24 23:38 ` [patch 2/9] lib: radix-tree: radix_tree_delete_item() Johannes Weiner
2013-11-25 8:21 ` Minchan Kim
2013-11-24 23:38 ` [patch 3/9] mm: shmem: save one radix tree lookup when truncating swapped pages Johannes Weiner
2013-11-25 8:21 ` Minchan Kim
2013-11-24 23:38 ` [patch 4/9] mm: filemap: move radix tree hole searching here Johannes Weiner
2013-11-24 23:38 ` [patch 5/9] mm + fs: prepare for non-page entries in page cache radix trees Johannes Weiner
2013-11-24 23:38 ` [patch 6/9] mm + fs: store shadow entries in page cache Johannes Weiner
2013-11-25 23:17 ` Dave Chinner
2013-11-26 10:20 ` Peter Zijlstra
2013-11-27 16:45 ` Johannes Weiner
2013-11-27 17:08 ` Johannes Weiner
2013-11-27 23:32 ` Dave Chinner
2013-11-24 23:38 ` [patch 7/9] mm: thrash detection-based file cache sizing Johannes Weiner
2013-11-25 23:50 ` Andrew Morton
2013-11-26 2:15 ` Johannes Weiner
2013-11-26 1:56 ` Ryan Mallon
2013-11-26 20:57 ` Johannes Weiner
2013-11-24 23:38 ` [patch 8/9] lib: radix_tree: tree node interface Johannes Weiner
2013-11-24 23:38 ` [patch 9/9] mm: keep page cache radix tree nodes in check Johannes Weiner
2013-11-25 23:49 ` Dave Chinner
2013-11-26 21:27 ` Johannes Weiner
2013-11-26 22:29 ` Dave Chinner
2013-11-26 23:00 ` Johannes Weiner
2013-11-27 0:59 ` Dave Chinner
2013-11-26 0:13 ` Andrew Morton
2013-11-26 22:05 ` Johannes Weiner
2013-11-26 0:57 ` Andrew Morton [this message]
2013-11-26 22:30 ` [patch 0/9] mm: thrash detection-based file cache sizing v6 Johannes Weiner
2013-11-28 4:40 ` Johannes Weiner
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